git.sesse.net Git - vlc/blob - modules/demux/playlist/shoutcast.c

   1 /*****************************************************************************
   2  * shoutcast.c: Winamp >=5.2 shoutcast demuxer
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea -@t- videolan -Dot- org>
   8  *          based on b4s.c by Sigmund Augdal Helberg <dnumgis@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_demux.h>
  31
  32 #include "playlist.h"
  33 #include "vlc_xml.h"
  34
  35 struct demux_sys_t
  36 {
  37     playlist_t *p_playlist;
  38     input_item_t *p_current_input;
  39
  40     xml_t *p_xml;
  41     xml_reader_t *p_xml_reader;
  42
  43     vlc_bool_t b_adult;
  44 };
  45
  46 /* duplicate from modules/services_discovery/shout.c */
  47 #define SHOUTCAST_BASE_URL "http/shout-winamp://www.shoutcast.com/sbin/newxml.phtml"
  48 #define SHOUTCAST_TUNEIN_BASE_URL "http://www.shoutcast.com"
  49 #define SHOUTCAST_TV_TUNEIN_URL "http://www.shoutcast.com/sbin/tunein-tvstation.pls?id="
  50
  51 /*****************************************************************************
  52  * Local prototypes
  53  *****************************************************************************/
  54 static int Demux( demux_t *p_demux);
  55 static int Control( demux_t *p_demux, int i_query, va_list args );
  56
  57 static int DemuxGenre( demux_t *p_demux );
  58 static int DemuxStation( demux_t *p_demux );
  59
  60 /*****************************************************************************
  61  * Import_Shoutcast: main import function
  62  *****************************************************************************/
  63 int E_(Import_Shoutcast)( vlc_object_t *p_this )
  64 {
  65     demux_t *p_demux = (demux_t *)p_this;
  66
  67     if( !demux2_IsForced( p_demux, "shout-winamp" ) )
  68         return VLC_EGENERIC;
  69
  70     STANDARD_DEMUX_INIT_MSG( "using shoutcast playlist reader" );
  71     p_demux->p_sys->p_playlist = NULL;
  72     p_demux->p_sys->p_xml = NULL;
  73     p_demux->p_sys->p_xml_reader = NULL;
  74
  75     /* Do we want to list adult content ? */
  76     var_Create( p_demux, "shoutcast-show-adult",
  77                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
  78     p_demux->p_sys->b_adult = var_GetBool( p_demux, "shoutcast-show-adult" );
  79
  80     return VLC_SUCCESS;
  81 }
  82
  83 /*****************************************************************************
  84  * Deactivate: frees unused data
  85  *****************************************************************************/
  86 void E_(Close_Shoutcast)( vlc_object_t *p_this )
  87 {
  88     demux_t *p_demux = (demux_t *)p_this;
  89     demux_sys_t *p_sys = p_demux->p_sys;
  90
  91     if( p_sys->p_playlist )
  92         vlc_object_release( p_sys->p_playlist );
  93     if( p_sys->p_xml_reader )
  94         xml_ReaderDelete( p_sys->p_xml, p_sys->p_xml_reader );
  95     if( p_sys->p_xml )
  96         xml_Delete( p_sys->p_xml );
  97     free( p_sys );
  98 }
  99
 100 static int Demux( demux_t *p_demux )
 101 {
 102     demux_sys_t *p_sys = p_demux->p_sys;
 103     xml_t *p_xml;
 104     xml_reader_t *p_xml_reader;
 105     char *psz_eltname = NULL;
 106     INIT_PLAYLIST_STUFF;
 107     p_sys->p_playlist = p_playlist;
 108     p_sys->p_current_input = p_current_input;
 109
 110     p_xml = p_sys->p_xml = xml_Create( p_demux );
 111     if( !p_xml ) return -1;
 112
 113     p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
 114     if( !p_xml_reader ) return -1;
 115     p_sys->p_xml_reader = p_xml_reader;
 116
 117     /* check root node */
 118     if( xml_ReaderRead( p_xml_reader ) != 1 )
 119     {
 120         msg_Err( p_demux, "invalid file (no root node)" );
 121         return -1;
 122     }
 123
 124     if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
 125         ( psz_eltname = xml_ReaderName( p_xml_reader ) ) == NULL ||
 126         ( strcmp( psz_eltname, "genrelist" )
 127           && strcmp( psz_eltname, "stationlist" ) ) )
 128     {
 129         msg_Err( p_demux, "invalid root node %i, %s",
 130                  xml_ReaderNodeType( p_xml_reader ), psz_eltname );
 131         if( psz_eltname ) free( psz_eltname );
 132         return -1;
 133     }
 134
 135     if( !strcmp( psz_eltname, "genrelist" ) )
 136     {
 137         /* we're reading a genre list */
 138         free( psz_eltname );
 139         if( DemuxGenre( p_demux ) ) return -1;
 140     }
 141     else
 142     {
 143         /* we're reading a station list */
 144         free( psz_eltname );
 145         if( DemuxStation( p_demux ) ) return -1;
 146     }
 147
 148     HANDLE_PLAY_AND_RELEASE;
 149     p_sys->p_playlist = NULL;
 150     return 0; /* Needed for correct operation of go back */
 151 }
 152
 153 #define GET_VALUE( a ) \
 154                         if( !strcmp( psz_attrname, #a ) ) \
 155                         { \
 156                             psz_ ## a = strdup( psz_attrvalue ); \
 157                         }
 158 /* <genrelist>
 159  *   <genre name="the name"></genre>
 160  *   ...
 161  * </genrelist>
 162  **/
 163 static int DemuxGenre( demux_t *p_demux )
 164 {
 165     demux_sys_t *p_sys = p_demux->p_sys;
 166     char *psz_name = NULL; /* genre name */
 167     char *psz_eltname = NULL; /* tag name */
 168     input_item_t *p_input;
 169
 170     while( xml_ReaderRead( p_sys->p_xml_reader ) == 1 )
 171     {
 172         int i_type;
 173
 174         // Get the node type
 175         i_type = xml_ReaderNodeType( p_sys->p_xml_reader );
 176         switch( i_type )
 177         {
 178             // Error
 179             case -1:
 180                 return -1;
 181                 break;
 182
 183             case XML_READER_STARTELEM:
 184                 // Read the element name
 185                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 186                 if( !psz_eltname ) return -1;
 187
 188                 if( !strcmp( psz_eltname, "genre" ) )
 189                 {
 190                     // Read the attributes
 191                     while( xml_ReaderNextAttr( p_sys->p_xml_reader ) == VLC_SUCCESS )
 192                     {
 193                         char *psz_attrname = xml_ReaderName( p_sys->p_xml_reader );
 194                         char *psz_attrvalue =
 195                             xml_ReaderValue( p_sys->p_xml_reader );
 196                         if( !psz_attrname || !psz_attrvalue )
 197                         {
 198                             FREENULL(psz_attrname);
 199                             FREENULL(psz_attrvalue);
 200                             free(psz_eltname);
 201                             /*FIXME: isn't return a bit too much. what about break*/
 202                             return -1;
 203                         }
 204
 205                         GET_VALUE( name )
 206                         else
 207                         {
 208                             msg_Warn( p_demux,
 209                                       "unexpected attribure %s in element %s",
 210                                       psz_attrname,psz_eltname );
 211                         }
 212                         free( psz_attrname );
 213                         free( psz_attrvalue );
 214                     }
 215                 }
 216                 free( psz_eltname ); psz_eltname = NULL;
 217                 break;
 218
 219             case XML_READER_TEXT:
 220                 break;
 221
 222             // End element
 223             case XML_READER_ENDELEM:
 224                 // Read the element name
 225                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 226                 if( !psz_eltname ) return -1;
 227                 if( !strcmp( psz_eltname, "genre" ) )
 228                 {
 229                     char *psz_mrl = malloc( strlen( SHOUTCAST_BASE_URL )
 230                             + strlen( "?genre=" ) + strlen( psz_name ) + 1 );
 231                     sprintf( psz_mrl, SHOUTCAST_BASE_URL "?genre=%s",
 232                              psz_name );
 233                     p_input = input_ItemNewExt( p_sys->p_playlist, psz_mrl,
 234                                                 psz_name, 0, NULL, -1 );
 235                     input_ItemCopyOptions( p_sys->p_current_input,
 236                                                 p_input );
 237                     free( psz_mrl );
 238                     input_ItemAddSubItem( p_sys->p_current_input, p_input );
 239                     vlc_gc_decref( p_input );
 240                     FREENULL( psz_name );
 241                 }
 242                 FREENULL( psz_eltname );
 243                 break;
 244         }
 245     }
 246     return 0;
 247 }
 248
 249 /* radio stations:
 250  * <stationlist>
 251  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 252  *   <station name="the name"
 253  *            mt="mime type"
 254  *            id="the id"
 255  *            br="bit rate"
 256  *            genre="A big genre string"
 257  *            ct="current track name/author/..."
 258  *            lc="listener count"></station>
 259  * </stationlist>
 260  *
 261  * TV stations:
 262  * <stationlist>
 263  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 264  *   <station name="the name"
 265  *            id="the id"
 266  *            br="bit rate"
 267  *            rt="rating"
 268  *            load="server load ?"
 269  *            ct="current track name/author/..."
 270  *            genre="A big genre string"
 271  *            lc="listener count"></station>
 272  * </stationlist>
 273  **/
 274 static int DemuxStation( demux_t *p_demux )
 275 {
 276     demux_sys_t *p_sys = p_demux->p_sys;
 277     input_item_t *p_input;
 278
 279     char *psz_base = NULL; /* */
 280
 281     char *psz_name = NULL; /* genre name */
 282     char *psz_mt = NULL; /* mime type */
 283     char *psz_id = NULL; /* id */
 284     char *psz_br = NULL; /* bit rate */
 285     char *psz_genre = NULL; /* genre */
 286     char *psz_ct = NULL; /* current track */
 287     char *psz_lc = NULL; /* listener count */
 288
 289     /* If these are set then it's *not* a radio but a TV */
 290     char *psz_rt = NULL; /* rating for shoutcast TV */
 291     char *psz_load = NULL; /* load for shoutcast TV */
 292
 293     char *psz_eltname = NULL; /* tag name */
 294
 295     while( xml_ReaderRead( p_sys->p_xml_reader ) == 1 )
 296     {
 297         int i_type;
 298
 299         // Get the node type
 300         i_type = xml_ReaderNodeType( p_sys->p_xml_reader );
 301         switch( i_type )
 302         {
 303             // Error
 304             case -1:
 305                 return -1;
 306                 break;
 307
 308             case XML_READER_STARTELEM:
 309                 // Read the element name
 310                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 311                 if( !psz_eltname ) return -1;
 312
 313                 // Read the attributes
 314                 if( !strcmp( psz_eltname, "tunein" ) )
 315                 {
 316                     while( xml_ReaderNextAttr( p_sys->p_xml_reader ) == VLC_SUCCESS )
 317                     {
 318                         char *psz_attrname = xml_ReaderName( p_sys->p_xml_reader );
 319                         char *psz_attrvalue =
 320                             xml_ReaderValue( p_sys->p_xml_reader );
 321                         if( !psz_attrname || !psz_attrvalue )
 322                         {
 323                             free(psz_eltname);
 324                             FREENULL(psz_attrname);
 325                             FREENULL(psz_attrvalue);
 326                             return -1;
 327                         }
 328
 329                         GET_VALUE( base )
 330                         else
 331                         {
 332                             msg_Warn( p_demux,
 333                                       "unexpected attribure %s in element %s",
 334                                       psz_attrname, psz_eltname );
 335                         }
 336                         free( psz_attrname );
 337                         free( psz_attrvalue );
 338                     }
 339                 }
 340                 else if( !strcmp( psz_eltname, "station" ) )
 341                 {
 342                     while( xml_ReaderNextAttr( p_sys->p_xml_reader ) == VLC_SUCCESS )
 343                     {
 344                         char *psz_attrname = xml_ReaderName( p_sys->p_xml_reader );
 345                         char *psz_attrvalue =
 346                             xml_ReaderValue( p_sys->p_xml_reader );
 347                         if( !psz_attrname || !psz_attrvalue )
 348                         {
 349                             free(psz_eltname);
 350                             FREENULL(psz_attrname);
 351                             FREENULL(psz_attrvalue);
 352                             return -1;
 353                         }
 354
 355                         GET_VALUE( name )
 356                         else GET_VALUE( mt )
 357                         else GET_VALUE( id )
 358                         else GET_VALUE( br )
 359                         else GET_VALUE( genre )
 360                         else GET_VALUE( ct )
 361                         else GET_VALUE( lc )
 362                         else GET_VALUE( rt )
 363                         else GET_VALUE( load )
 364                         else
 365                         {
 366                             msg_Warn( p_demux,
 367                                       "unexpected attribute %s in element %s",
 368                                       psz_attrname, psz_eltname );
 369                         }
 370                         free( psz_attrname );
 371                         free( psz_attrvalue );
 372                     }
 373                 }
 374                 free(psz_eltname);
 375                 break;
 376
 377             case XML_READER_TEXT:
 378                 break;
 379
 380             // End element
 381             case XML_READER_ENDELEM:
 382                 // Read the element name
 383                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 384                 if( !psz_eltname ) return -1;
 385                 if( !strcmp( psz_eltname, "station" ) &&
 386                     ( psz_base || ( psz_rt && psz_load &&
 387                     ( p_sys->b_adult || strcmp( psz_rt, "NC17" ) ) ) ) )
 388                 {
 389                     char *psz_mrl = NULL;
 390                     if( psz_rt || psz_load )
 391                     {
 392                         /* tv */
 393                         psz_mrl = malloc( strlen( SHOUTCAST_TV_TUNEIN_URL )
 394                                           + strlen( psz_id ) + 1 );
 395                         sprintf( psz_mrl, SHOUTCAST_TV_TUNEIN_URL "%s",
 396                                  psz_id );
 397                     }
 398                     else
 399                     {
 400                         /* radio */
 401                         psz_mrl = malloc( strlen( SHOUTCAST_TUNEIN_BASE_URL )
 402                             + strlen( psz_base ) + strlen( "?id=" )
 403                             + strlen( psz_id ) + 1 );
 404                         sprintf( psz_mrl, SHOUTCAST_TUNEIN_BASE_URL "%s?id=%s",
 405                              psz_base, psz_id );
 406                     }
 407                     p_input = input_ItemNewExt( p_sys->p_playlist, psz_mrl,
 408                                                 psz_name , 0, NULL, -1 );
 409                     free( psz_mrl );
 410
 411                     input_ItemCopyOptions( p_sys->p_current_input,
 412                                                 p_input );
 413
 414 #define SADD_INFO( type, field ) if( field ) { input_ItemAddInfo( \
 415                     p_input, _("Shoutcast"), _(type), "%s", field ) ; }
 416                     SADD_INFO( "Mime type", psz_mt );
 417                     SADD_INFO( "Bitrate", psz_br );
 418                     SADD_INFO( "Listeners", psz_lc );
 419                     SADD_INFO( "Load", psz_load );
 420                     if( psz_genre )
 421                         input_item_SetGenre( p_input, psz_genre );
 422                     if( psz_ct )
 423                         input_item_SetNowPlaying( p_input, psz_ct );
 424                     if( psz_rt )
 425                         input_item_SetRating( p_input, psz_rt );
 426                     input_ItemAddSubItem( p_sys->p_current_input, p_input );
 427                     vlc_gc_decref( p_input );
 428                     FREENULL( psz_name );
 429                     FREENULL( psz_mt );
 430                     FREENULL( psz_id );
 431                     FREENULL( psz_br );
 432                     FREENULL( psz_genre );
 433                     FREENULL( psz_ct );
 434                     FREENULL( psz_lc );
 435                     FREENULL( psz_rt );
 436                 }
 437                 free( psz_eltname );
 438                 break;
 439         }
 440     }
 441     return 0;
 442 }
 443
 444 static int Control( demux_t *p_demux, int i_query, va_list args )
 445 {
 446     return VLC_EGENERIC;
 447 }